[azure-core-cpp] Update to 1.2.1 (#19943)

## 1.2.1 (2021-09-02)

### Bugs Fixed

- [2785](https://github.com/Azure/azure-sdk-for-cpp/issues/2785) Fix to build on g++ 5.5.

### Other Changes

- Fixed compilation error on POSIX platforms where OpenSSL was not available.
- Support CMake version 3.12

Co-authored-by: Billy Robert O'Neal III <bion@microsoft.com>

ports/azure-core-cpp/portfile.cmake

@@ -1,8 +1,8 @@
 vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO Azure/azure-sdk-for-cpp
-    REF azure-core_1.2.0
-    SHA512 03297bcb54156730a35467bfd1591d07c0ef131c6183ac97f98ab845f32103cd930bb99e0fee2f334f64dceece866ec0c5e9c4ad91c96299c6fb08537a863983
+    REF azure-core_1.2.1
+    SHA512 3628c4845eb1a842a06339a606fba8ae127f3744a097cc3ecd7552a052b9c932e0a008f8654a4affde68c483be38678a1728bf19d644c6ee04b2cd34f1513b32
 )
 
 vcpkg_check_features(

ports/azure-core-cpp/vcpkg.json

@@ -1,13 +1,12 @@
 {
   "name": "azure-core-cpp",
-  "version-semver": "1.2.0",
+  "version-semver": "1.2.1",
   "description": [
     "Microsoft Azure Core SDK for C++",
     "This library provides shared primitives, abstractions, and helpers for modern Azure SDK client libraries written in the C++."
   ],
   "homepage": "https://github.com/Azure/azure-sdk-for-cpp/tree/main/sdk/core/azure-core",
   "license": "MIT",
-  "builtin-baseline": "14c54c49b56a964ac7f2f701a6857adb02ae1bec",
   "dependencies": [
     {
       "name": "openssl",

versions/a-/azure-core-cpp.json

@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "842ba2028c1b8b50de96e7c27e85959889778ab0",
+      "version-semver": "1.2.1",
+      "port-version": 0
+    },
     {
       "git-tree": "68831f9976e41448ebf74ead081d41ce09042c38",
       "version-semver": "1.2.0",

versions/baseline.json

@@ -277,7 +277,7 @@
       "port-version": 1
     },
     "azure-core-cpp": {
-      "baseline": "1.2.0",
+      "baseline": "1.2.1",
       "port-version": 0
     },
     "azure-identity-cpp": {